It depends on where the crack is located. In some states, if the crack is not in the drivers field of view, it can pass a safety inspection. Field of view varies from state to state and many states won’t allow any crack that is greater than a certain size, again size varies by state. If any crack completes a circle, then it has to be replaced in just about all states. You will have to check your states laws.
Some states have required safety inspections, in those states, you can find yourself at the mercy of the inspector. When I was stationed in Virginia, I had a crack that went along the bottom of my windshield. It passed several inspection several times, but once, I ran into an inspector that had a rather unusual interpretation of the law. The law did not allow a crack that completed a circle larger than 1.5". Mine completed a circle of slightly less than 1". The inspector interpreted the rule as completing a circle greater than the radius of a 1.5" diameter circle.